There are corner cases[1] where this is needed and it also makes it possible to do a 1:1 map to SCardTransmit calls, where you always have to explicitly specify transmission protocol.
[1] direct connection with 0 as preferred protocol and later negotiate a protocol via a control message to the reader.
There are corner cases[1] where this is needed and it also makes it possible to do a 1:1 map to SCardTransmit calls, where you always have to explicitly specify transmission protocol.
[1] direct connection with 0 as preferred protocol and later negotiate a protocol via a control message to the reader.
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